BICEP3 performance overview and planned Keck Array upgrade

Grayson, J. A., Ade, P. A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Ahmed, Z., Alexander, K. D., Amiri, M., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Boenish, H., Bowens-Rubin, R., Buder, I., Bullock, E., Buza, V., Connors, J., Filippini, J. P., Fliescher, S., Halpern, M., Harrison, S., Hilton, G. C., Hristov, V. V., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Lefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kou, C. L., Leitch, E. M., Lueker, M., Megerian, K. G., Monticue, V., Namikawa, T., Netterfield, C. B., Nugyen, H. T., O'Brient, R., Ogburn IV, R. W., Pryke, C., Reintsema, C. D., Richter, S., Schwarz, R., Sorenson, C., Sheehy, C. D., Staniszewski, Z. K., Steinbach, B., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C. ORCID: https://orcid.org/0000-0002-1851-3918, Turner, A. D., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K. and Yoon, K. W. 2016. BICEP3 performance overview and planned Keck Array upgrade. Presented at: SPIE Astronomical Telescopes + Instrumentation 2016, Edinburgh, Scotland, 26 June - 1 July 2016. Proceedings Volume 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. , vol.9914 SPIE, 99140S. 10.1117/12.2233894

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Abstract

Bicep3 is a 520mm aperture, compact two-lens refractor designed to observe the polarization of the cosmic microwave background (CMB) at 95 GHz. Its focal plane consists of modularized tiles of antenna-coupled transition edge sensors (TESs), similar to those used in Bicep2 and the Keck Array. The increased per-receiver optical throughput compared to Bicep2/Keck Array, due to both its faster f=1:7 optics and the larger aperture, more than doubles the combined mapping speed of the Bicep/Keck program. The Bicep3 receiver was recently upgraded to a full complement of 20 tiles of detectors (2560 TESs) and is now beginning its second year of observation (and first science season) at the South Pole. We report on its current performance and observing plans. Given its high per-receiver throughput while maintaining the advantages of a compact design, Bicep3- class receivers are ideally suited as building blocks for a 3rd-generation CMB experiment, consisting of multiple receivers spanning 35 GHz to 270 GHz with total detector count in the tens of thousands. We present plans for such an array, the new "BICEP Array" that will replace the Keck Array at the South Pole, including design optimization, frequency coverage, and deployment/observing strategies.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
Last Modified:	03 May 2023 12:30
URI:	https://orca.cardiff.ac.uk/id/eprint/156661

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